EP 0738698 B1 2000-08-23 - Process for decomposition of cumene hydroperoxide
Process for decomposition of cumene hydroperoxide
Verfahren zur Spaltung von Cumolhydroperoxid
Procédé de décomposition de l'hydropéroxyde de cumène
- EP 93307016 A
- US 94468892 A
[origin: CA2105187A1] A method for the enhanced decomposition of cumene hydroperoxide by acidic catalyst to phenol and acetone which comprises decomposing cumene hydroperoxide in a non-isothermal manner in the presence of excess acetone whereby the molar ratio of acetone to phenol in a decomposition reactor is from about 1.1: 1 to 1.5:1. A method for enhancing the selectivity of the decomposition of dicumyl peroxide to alpha methylstyrene also phenol and acetone in the presence of an acidic catalyst which comprises carrying out the decomposition at a temperature of from about 80 to 110.degree.C. A method for carrying out the decomposition of dicumyl peroxide with an acidic catalyst system which comprises performing such decomposition in the presence of the reaction product of (1) an amine with (2) an acidic material which can catalyze the decomposition of CHP. A composition comprising CHP, cumene, acidic catalyst for decomposition of CHP, dicumyl peroxide, dimethylbenzyl alcohol, phenol, and acetone wherein the acetone is in a molar ratio to phenol of from about 1.1:1 to 1.6:1. A composition comprising cumene, acidic catalyst for decomposing CHP, DCP, water, phenol, acetone and a reaction product of (1) an amine with (2) an acid which catalyzes the decomposition of CHP. A method for preparing phenol and acetone from the decomposition of CHP with an acidic catalyst which comprises (a) decomposing CHP at a specific acidic catalyst concentration and temperature thereby forming a composition comprising phenol, acetone and dicumyl peroxide, (b) transferring dicumyl peroxide to a plug flow reactor wherein decomposition of dicumyl peroxide to phenol, acetone and AMS occurs at a lower acidic catalyst concentration and a higher temperature than the catalyst concentration and temperature in step (a). A method for maintaining the control of an acid catalyzed CHP decomposition in a multiplicity of sequential reactors which comprises passing a portion of the outlet stream of the last sequential reactor into a reactor of plug flow design and a smaller size compared to the CHP decomposition reactors wherein the delta T.degree.C of the inlet temperature and the outlet temperature of said plug flow reactor is from about 4 to 16.degree.C. A method for enhancing the decomposition of CHP and producing CHP decomposition products therefrom which comprises recycling the CHP decomposition products to a CHP feedstream in the quantity of from about 10-25 times the weight of the CHP feedstream. A method for enhancing the decomposition of CHP to phenol and acetone which comprises having additional water in the CHP decomposition reactor. A CHP decomposition mass having an acetone to phenol mole ratio of about 1.1 to 1 to 1.5 to 1.